- Joined
- 11 Jan 2004
- Messages
- 45,849
- Reaction score
- 3,513
- Country


It does - but probably only because the pins will not fit into a BS1363 socket (at least, without some 'welly'!!)!At least it says "Do not use in the UK".
HAZARD OF IMPROPER OPERATION
Do not use Test Button to switch OFF RCBO.
Failure to follow these instructions can result in death, serious injury,
or equipment damage
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
Test once a month each device by pressing on the button marked "T".
Failure to follow these instructions will result in death or serious injury.
That rather reminds me of my oft-mentioned story about what happened when my daughter pressed the test button on her RCD ...... "Do not use Test Button to switch OFF RCBO. Failure to follow these instructions can result in death, serious injury, or equipment damage" ...

Same with my daughter. There was a very loud bang and a cloud of soot (which took out the cutout fuse). Unfortunately, it has caused her to take a "never again" attitude to pressing a test button. In that case, the problem arose because when it operated, the trip mechanism somehow sliced through the insulation of the main conductors, presumably due to some manufacturing fault (although she had been pressing the button regularly for several years before this happened)...That happened to me when I pressed the test button on an old QOH Square D RCBO.. Gave me a hell of a fright!
I think that was one of Adam's main implied points. There obviously is no difference - so how on earth can using the button to switch is off carry a risk of death AND yet failure to press it monthly (to test) can also result in death?!!Can someone please explain the difference between using the test button to switch off and using the test button to test.
Does the notice to test (or any manufacturer) say turn off all associated MCBs before pressing the test button?Perhaps it's implied that their might be a leakage in the load and therefore the load should be disconnected before pressing the button? Otherwise the test would not be reliable.
Why would you turn off MCBs before switching?
Perhaps it's implied that their might be a leakage in the load and therefore the load should be disconnected before pressing the button? Otherwise the test would not be reliable.
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local